224 Part ITI.—EHleventh Annual Report 
thoracic segment equal in breadth to about four-fifths the length, and 
rather longer than the entire length of the other thoracic segments ; fore- 
head moderately broad, somewhat produced and truncate. Anterior 
antenne slightly longer than the first thoracic segment, eleven-jointed, 
moderately stout, and sparingly setiferous; the fifth joint distinctly 
shorter, the first and seventh subequal and longer than any of the others. 
The formula shows very nearly the comparative length of the joints :— 
23 S07 Ll? Be Doty LR e a elSts wile AG) a0) 
Dy Ged By VAL SA NB) Biker Sap Sun Rah WL Banal ae 
Posterior antenne four-jointed, second and third joints smaller than the 
first and last. A long plumose seta springs from the lower distal extremity 
of the first joint; opposite to this, on the upper edge, are two short plain 
setz: there is a small seta near the middle of the upper margin of the 
second joint, and on the upper margin of the third joint there is a row of 
small spiniform sete arranged in a pectinate manner,—the setze at the 
distal being much longer than the posterior ones; the extremity of the 
posterior antennze bears a fascicle of sete, one of which is longer and 
plumose; the second, third, and last joints are ciliate on the lower 
margin. The base of the mandible is provided with two long plumose 
and one very small plain sete (fig. 4). Anterior footjaws short, four-jointed, 
the first being equal in length to the other three ; the last is very small ; 
the first joint bears three sete, the second two, and the third and fourth 
one each. These sete are furnished with short bristle-like cilia arranged 
somewhat widely apart; the fourth joint also bears two small terminal 
plain setze (fig. 5). Posterior footjaw stout, well developed, four-jointed ; 
the first joint bears two plumose setz that arise from a papilliform process 
near the upper distal margin; a seta with bristle-like cilia springs from 
a conical base of the upper margin of the second joint, at the distal end of 
the same joint, two similar sete arise from an elongate digitiform process ; 
the upper part of the distal end of the third joint is produced so as to 
extend fully beyond the last two small joints, and terminates in a seta 
similar to those just described and a stout elongate spine (fig. 6). The 
basal joint of the fifth pair of feet is furnished with one stout seta 
plumose of the distal half; a long stout seta also plumose on the distal 
half springs from the end of the second joint; on the upper margin of 
the same joint, and near the base of the terminal seta, there is a fringe of 
stout cilia; and a short, moderately-stout spine, serrate on the interior 
edge, springs from the lower margin. ‘The abdomen tapers very gradually ; 
the posterior margins of the abdominal segments are fringed with small 
teeth ; the last segment is considerably longer than the preceding one. 
Caudal stylets nearly one anda half times the length of the last abdominal 
segment. There is a small toothed notch on the outer margin near the 
middle of the proximal half of each stylet, and a small seta springs from 
near the middle of the lower half; the terminal sete are plumose and of 
moderate length. 
This species was first obtained in the upper reaches of the Firth of 
Forth in Nov. 1887; but though thus apparently a marine species, Dr Brady 
suggested that its real habitat might be ‘in some of the streams or ponds 
‘whose contents find their way into the Forth.’ The discovery of this 
species in Loch Morar—the second time it has been observed in 
_ Scotland—shows that the explanation of its occurrence in the Forth 
estuary suggested by Dr Brady is probably correct. Cyclops ewartt was 
of frequent occurrence in Loch Morar. 
’ Cyclops Kaufmanni, Uljanin. 
1875. Cyclops Kaufmanni, Uljanin, Reise in Turkestan (Crust. ) 
p. 38, t. xii, figs. 2-4, 
1891. & 'yclops Kaufmanni, Brady, Revision, p. 24, Pl. VIL. fig. 3 
